Hadith 1:22

Narrated Abu Said Al-Khudri:

Allah's Apostle said, "While I was sleeping I saw (in a dream) some
people wearing shirts of which some were reaching up to the breasts
only while others were even shorter than that. Umar bin Al-Khattab was
shown wearing a shirt that he was dragging." The people asked, "How
did you interpret it? (What is its interpretation) O Allah's Apostle?"
He (the Prophet ) replied, "It is the Religion."